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.S 2 D N O M M U R D A m d v 0 V M 0 m SKYLIGHT.

No. 293,429. Patehted Feb. 12, 1884.

fiWITNESSES Mm g N. PETER$. FholoLllhnpmphu. Washinglml. n. c.

UNITED STATES PATENT Fries.

ALEXANDER DRUMMOND, OF EDINBURGH, SCOTLAND.

SKYLIGHT.

SPECIFICATION forming part of Letters Patent No; 293,429, dated February 12, 1884, Application filed May 31, 1883. (No model.) Patented in England July 14, 1882,N0. 3,340.

To all whom it may concern bars for roof-lights and window-frames generally, as more fully described hereinafter.

In the accompanying drawings, Figure l is a transverse section of a portion of a skylight with my improvements. Fig. 2 is alongitudinal section, and Fig. 3 a sectional perspective view, of the same. Fig. 4 is a longitudinal section of a modified form of sashbar; Fig. 5, a transverse section of the same; Fig. 6, a transverse section of a modification, and Fig. 7 a sectional view, of a joint for overlapping sections of glass.

In preparing the panes of glass to be applied, as part of my invention, in the skylights, I provide the edges of the glass,which are to fit in the sash-bars or astragals, with raised strengthening ribs F, composed of flanged or folded strips of sheet metal. These sheetmetal ribs are first filled with soft putty or equivalent material, and the edges of the glass are then pressed into them, as indicated at the right-hand side of Fig. 1. The panes of glass thus provided with a strengtheningrib raised on the surface side of the glass, and practically forming a part thereof, are ready for application to the sash-bar frame.

Referring to, Figs. 1, 2, and 8, A is the bar or astragal, which in this instance is made of wood, and has a central ridge, A, and a groove, a, on each side, to carry off the water of condensation formed on the under side of the glass 13. The ribbed edges of the glassare laid on the shoulders at of the bars, and over them are fitted elongated caps or strips, 0, of zinc or other sheet metal, fitting over the ridge A and terminating in lateral wings a, inclosing the ribs F, and coming down onto the face of the glass; but some play is left between the ribbed edge of the glass and the ridge A, to allow for the expansion and contraction of the glass. The ribs F, being fitted closely on the edges of the glass, and projecting above the surface thereof,leave no opening or way for the passage of water to the sash-bar. The ridge-strips O c are secured at intervals to the ridge of the wooden bar by screws e or similar devices.

In applying the strips C cto the outer bar of the sash-frame, the glass being only on one side, the outer edges of the strips are adapted to grooves a in the bar, as shown at the left hand of Fig. 3.

Where the lower edge of one pane overlaps the succeeding pane in inclined or vertical roof-lights, aretaining-piece, E, Figs. 2 and 3, may be used to support the upper pane, this retaining-piece being secured to the sashabar and extending down on each side thereof.

Figs. 4, 5, and 6 show my improvements applied in connection with forms of iron astragals' instead of wooden ones.. Strips O, of 1ead,are shown fitted over the ridge A of the astragal, and are secured by bolts or screws e, which are inserted in dovetailed recesses f in the ridge A. These screws pass out through openings in the strips 0, and are fitted with washers and. nuts e on the outside.

In Figs. 4 and 5 the astragal is ofanchorsection, while in Fig. 6 it is of inverted-T 1ron.

I combine with the overlapping edges of the sheets of glass a bent strip of sheet metal, S, Fig. 7, which prevents water or dust blowing in at the overlapping edges.

I claim as my invention- 1. The combination of a sashframe with a pane of glass having secured thereto strengthening-ribs F, the glass thus strengthened being applied in the frame, substantially as set forth.

- 2. The combination of a sash-frame having ridge strips 0, with panes of glass having secured thereto strengthening-ribs F, raised onthe surface side, and adapted to be overlapped by said strips,.substantially as described.

3. The combination of a sash -frame and ridge-strips O, with panes of glass having along the edges ribs F, formed of flanged strips filled with putty, into which the edge of the glass is set, substantially as specified.

In testimony whereoflhave signed my name to this specification in the presence of two subscribing witnesses.

ALEXANDER Witnesses:

(inns. M. Low, GEORGE E. LINDSAY.

DRUMMOND. 

